<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>loading</title>
</head>
<body>
<style>
    html, body {
        height: 100%;
    }

    .Masklock {
        width: 100%;
        height: 100%;
        position: fixed;
        top: 0px;
        left: 0px;
        background: rgba(0, 0, 0, 0.3);
    }

    .loadBlock {
        width: 140px;
        height: 140px;
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        z-index: 9999;
    }

    .loadBlock:after {
        content: '';
        width: 100%;
        height: 100%;
        background: url("img/asd.png");
        background-size: cover;
        display: block;
        -webkit-animation: change 1.8s linear infinite;
    }

    @-webkit-keyframes change {
        from {
            transform: rotate(0deg);
        }
        to {
            transform: rotate(360deg);
        }
    }

</style>

<div class="Masklock">
</div>
<div class="loadBlock"></div>


</body>
</html>